Reliability determination method for twist pin electrical connector

Abstract

The present application provides a method for determining the reliability of a twist pin type electrical connector, the method comprising: obtaining the design parameters of the electrical connector; using a predetermined reliability model to perform model analysis on the design parameters to obtain the reliability of the electrical connector; wherein the training samples of the reliability model include the design parameters of the electrical connector under different environmental stress parameters; the reliability characterizes the reliability of the electrical connector under the influence of environmental stress; wherein the reliability is used to perform parameter optimization processing on the design parameters. The method of the present application solves the problem of low accuracy of the reliability obtained when the reliability of aerospace twist pin type electrical connectors is determined using the model method of the prior art.

Description

Technical Field

[0001] The present application relates to the technical field of electrical connector design, and in particular to a method for determining the reliability of a twist pin type electrical connector. Background Art

[0002] The reliability (such as contact reliability) of aerospace twist pin electrical connectors directly affects the working reliability and service life of aerospace devices (such as satellites).

[0003] In the design process of the twist pin type electrical connector, the determination of the contact reliability of the twist pin type electrical connector under certain design parameters is an important basis for judging whether the design parameters are reasonable and optimizing the design parameters. At present, in the design process of the twist pin type electrical connector, the methods for determining the contact reliability of the electrical connector mainly include: a model method for model analysis of the design parameters of the electrical connector, and a test method for testing the electrical connector in kind. Among them, the test method has the advantage of high accuracy of the test results (i.e., the obtained reliability), but the test method is time-consuming, inefficient, and costly, which will seriously affect the design efficiency. Therefore, the test method is rarely used in the design process of the electrical connector. When determining the contact reliability of the electrical connector, the model method only requires the designer to input the design parameters into the pre-built reliability design model. After the reliability design model performs model analysis on the input design parameters, the reliability of the electrical connector corresponding to the design parameters can be obtained. The model method has the advantages of high efficiency, convenience, speed, and low cost. In the design process of the electrical connector, it is the main method used by designers to determine the contact reliability of the electrical connector.

[0004] When the reliability of aerospace twist pin electrical connector is determined by the model method of the prior art, there is a problem of low accuracy of the obtained reliability. Summary of the invention

[0005] The present application provides a method for determining the reliability of a twist pin type electrical connector, so as to solve the problem of low accuracy of the reliability obtained when the reliability of a twist pin type electrical connector for aerospace is determined by the model method of the prior art.

[0006] In a first aspect, the present application provides a method for determining the reliability of a twist pin type electrical connector, comprising:

[0007] Obtaining design parameters of the electrical connector;

[0008] A predetermined reliability model is used to perform a model analysis on the design parameters to obtain the reliability of the electrical connector; wherein the training samples of the reliability model include the design parameters of the electrical connector under different environmental stress parameters; and the reliability represents the reliability of the electrical connector under the environmental stress.

[0009] The reliability is used to perform parameter optimization processing on the design parameters.

[0010] Optionally, the environmental stress parameters include temperature stress parameters and vibration stress parameters;

[0011] The obtaining of design parameters of the electrical connector includes:

[0012] Obtaining structural parameters and operating parameters of the electrical connector;

[0013] The adopting a predetermined reliability model to perform model analysis on the design parameters to obtain the reliability of the electrical connector includes:

[0014] A predetermined reliability model is used to perform model analysis on the structural parameters and operating parameters to obtain the reliability of the electrical connector under the effects of temperature stress and vibration stress.

[0015] Optionally, the structural parameters include: the diameter D0 of the outermost layer of the twisted wire of the twisted wire pin, the cantilever length L of the twisted wire pin c , the radius R of the convex hull of the twisted wire pin ch 、Inner radius of the socket R jid 、Inner chamfer radius R of the socket j , the number of strands N of the outermost strand of the stranded wire pin;

[0016] The working condition parameters include: temperature stress T, vibration stress S and working time t;

[0017] The adopting a predetermined reliability model to perform model analysis on the structural parameters and the operating condition parameters to obtain the reliability of the electrical connector under the action of temperature stress and vibration stress includes:

[0018] The following reliability model is used to perform model analysis on the structural parameters and operating parameters to obtain the reliability of the electrical connector under temperature stress and vibration stress:

[0019]

[0020] Among them, ω is the deflection generated after the twisted wire pin and the socket are stably inserted, R ch R is the radius of the convex hull of the twisted wire pin. jid R is the inner radius of the socket. j is the chamfer radius of the inner circle of the socket, I is the moment of inertia of the outermost wire of the twisted wire pin, D0 is the diameter of the outermost wire of the twisted wire pin, F p L is the contact pressure after the twisted wire pin and the socket are stably inserted. cis the cantilever length of the twisted wire pin, E is the elastic modulus of the twisted wire material, C is the stress relaxation rate of a single twisted wire after one hour of stress relaxation, T1 is the temperature stress, S is the vibration stress, v p is the stress relaxation rate of the contact pressure between a single strand and the socket, α is the film resistance degradation rate, expressed as α follows a log-normal distribution, μ α is the logarithmic mean of α, r is the contact resistance between the twisted wire pin and the socket, r v is the bulk resistance of the contact material, ρ1 is the resistivity of the twisted wire pin, ρ2 is the resistivity of the twisted wire, N is the number of twisted wires in the outermost layer of the twisted wire pin, t is the working time, π is the circumference, H is the material contact hardness, R(z) is the reliability function, D is the failure threshold of the contact resistance, r s * is the contraction resistance between a single twisted wire and the pin in parallel, s is the integral variable, g is the number of contacts of the electrical connector, σ α , β, z1, z2, z3, z4, z5, z6, z7, z8, and z9 are all preset parameter values ​​of the model obtained through experimental statistics.

[0021] Optionally, the film resistance degradation rate α and the stress relaxation rate v of the contact pressure between the single strand and the socket p They are determined by the following formulas:

[0022]

[0023] v p =A S exp(-Q / kT1)S a ;

[0024] Among them, A S is a constant related to the material, ΔE is the activation energy in the reaction kinetics theory, k is the universal gas constant, T1 is the temperature stress, S is the vibration stress, H is the material contact hardness, N is the number of twisted wires in the outermost layer of the twisted wire pin, Q is the thermal activation energy, β and a are the preset parameter values ​​of the model obtained through experimental statistics.

[0025] Optionally, after the reliability of the electrical connector is obtained by performing a model analysis on the design parameters using a predetermined reliability model, the method further includes:

[0026] determining whether the obtained reliability is below a reliability threshold;

[0027] If the obtained reliability is lower than the reliability threshold, the parameter value of the design parameter is adjusted.

[0028] Optionally, the method further includes:

[0029] Obtaining a corresponding relationship between the reliability R of the electrical connector and different working durations t;

[0030] According to the corresponding relationship, the maximum life of the electrical connector corresponding to the design parameters is determined.

[0031] In a second aspect, the present application provides a reliability calculation device for a twist pin type electrical connector, the device comprising:

[0032] A processing unit and a model unit, wherein the processing unit is connected to the model unit respectively;

[0033] The processing unit is used to obtain design parameters of the electrical connector from a data acquisition device, and send the design parameters obtained from the data acquisition device and the preset design parameters in the processing unit to the model unit;

[0034] The model unit is used to perform model analysis on the obtained design parameters using a predetermined reliability model to obtain the reliability of the electrical connector, and send the reliability to the processing unit; wherein the training samples of the reliability model include the design parameters of the electrical connector under different environmental stress parameters; the reliability represents the reliability of the electrical connector corresponding to the working time t of the electrical connector under the environmental stress;

[0035] The processing unit is further used to obtain the maximum life of the electrical connector based on the corresponding relationship between the reliability R and different working time lengths t; and send at least one of the reliability and the maximum life to the data acquisition device.

[0036] In a third aspect, the present application provides a reliability calculation device, comprising:

[0037] Processor and memory;

[0038] The memory stores executable instructions executable by the processor;

[0039] The processor executes the executable instructions stored in the memory, so that the processor executes the method as described above.

[0040] In a fourth aspect, the present application provides a storage medium, wherein the storage medium stores computer-executable instructions, and the computer-executable instructions are used to implement the method described above when executed by a processor.

[0041] In a fifth aspect, the present application provides a program product, including a computer program, which implements the method described above when executed by a processor.

[0042] The reliability determination method of the twist pin type electrical connector provided in the present application performs model analysis on the design parameters of the electrical connector by using a reliability model obtained through training based on temperature stress parameters and vibration stress parameters, thereby obtaining the reliability of the electrical connector under environmental stress including temperature stress and vibration stress. The present application solves the problem of low reliability accuracy of aerospace twist pin type electrical connectors determined by the reliability design model of the prior art. When designers use the reliability determined by the reliability determination method of the twist pin type electrical connector provided in the present application to optimize the design of the aerospace twist pin type electrical connector, the rationality of the design parameters of the electrical connector designed by them can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0044] Figure 1 A diagram showing the reliability determination system of the twist pin type electrical connector provided in an embodiment of the present application;

[0045] Figure 2 The reliability determination method of the twist pin type electrical connector provided in the embodiment of the present application is as follows: Figure 1 ;

[0046] Figure 3 A schematic diagram of the twisted wire pin structure of the twist pin type electrical connector provided in an embodiment of the present application;

[0047] Figure 4 The reliability determination method of the twist pin type electrical connector provided in the embodiment of the present application is as follows: Figure 2 ;

[0048] Figure 5 A schematic diagram of a lifespan curve provided in an embodiment of the present application;

[0049] Figure 6 A structural diagram of a reliability calculation device for a twist pin type electrical connector provided in an embodiment of the present application;

[0050] Figure 7 This is a structural diagram of the reliability calculation device provided in an embodiment of the present application.

[0051] Description of reference numerals:

[0052] 100-twisted wire pin of twisted pin electrical connector; 101-the outermost twisted wire of the twisted wire pin.

[0053] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0055] In the modeling process of the existing reliability design model, temperature stress is mainly modeled as environmental stress. Therefore, when the contact reliability of the electrical connector is determined by the existing reliability design model, the contact reliability of the electrical connector obtained is the contact reliability under the action of temperature stress. However, during the service of the aerospace twist pin type electrical connector, in addition to temperature stress, there is also vibration stress in the environmental stress of its service environment. Therefore, when the reliability design model of the prior art is used to determine the reliability of the aerospace twist pin type electrical connector, there is a problem of low accuracy of the obtained reliability. When the designer uses the contact reliability of the electrical connector determined by the prior art model method to design the aerospace twist pin type electrical connector, it will lead to unreasonable design parameters of the designed electrical connector.

[0056] In this regard, the present application proposes a method for determining the reliability of a twist pin type electrical connector to solve the problem of low accuracy of the reliability of aerospace twist pin type electrical connectors determined by the reliability design model of the prior art. The reliability determination method of the twist pin type electrical connector proposed in the present application is described below in conjunction with some embodiments.

[0057] Figure 1 This is a diagram of the reliability determination system of the twist pin type electrical connector provided in the embodiment of the present application. Figure 1 As shown, the reliability determination system of the twist pin type electrical connector provided in the embodiment of the present application includes: a data acquisition device 11 and a reliability calculation device 12, and the data acquisition device 11 is connected to the reliability calculation device 12. The data acquisition device 11 includes but is not limited to electronic equipment (such as a computer or other electronic computer, etc.) used by designers to design electrical connectors, electrical connector detection equipment, and other equipment.

[0058] Exemplarily, the reliability calculation device 12 obtains the design parameters of the electrical connector from the data acquisition device 11. For example, when the data acquisition device 11 is a detection device for the electrical connector, the data acquisition device 11 directly detects the design parameters of the finished electrical connector or the components of the electrical connector to obtain the design parameters of the electrical connector. Then, the data acquisition device 11 sends the detected design parameters of the electrical connector to the reliability calculation device 12. Based on the obtained design parameters, the reliability calculation device 12 uses a predetermined reliability model to perform model analysis on the design parameters to obtain the reliability of the electrical connector. Among them, the training samples of the reliability model include the design parameters of the electrical connector under different environmental stress parameters, such as temperature stress parameters and vibration stress parameters. The reliability characterizes the reliability of the electrical connector under the action of environmental stress. For example, the reliability characterizes the reliability of the electrical connector under the action of environmental stress including temperature stress and vibration stress. The reliability is used to perform parameter optimization processing on the design parameters. Exemplarily, if the data acquisition device 11 is an electronic device for design by a designer, the reliability calculation device 12 can send the obtained reliability to the data acquisition device 11. The designer can optimize and adjust the design parameters of the electrical connector through the data acquisition device 11 based on the reliability of the electrical connector obtained by the data acquisition device 11 .

[0059] The reliability determination method of the twist pin type electrical connector provided in the embodiment of the present application, by adopting the reliability model obtained by training the design parameters under the temperature stress parameters and the vibration stress parameters, performs model analysis on the design parameters of the electrical connector, thereby obtaining the reliability of the electrical connector under the environmental stress including temperature stress and vibration stress, and solves the problem of low accuracy of the reliability of the aerospace twist pin type electrical connector determined by the reliability design model of the prior art. When the designer adopts the reliability determined by the reliability determination method of the twist pin type electrical connector provided in the present application to optimize the design of the aerospace twist pin type electrical connector, the rationality of the design parameters of the electrical connector designed by the designer can be ensured. At the same time, when the finished electrical connector is physically tested, the reliability determination method of the twist pin type electrical connector provided in the present application can also be used to determine the reliability of the test sample as a data supplement for the subsequent physical test; the test sample of the physical test can also be selected by the reliability determination method of the twist pin type electrical connector provided in the present application for targeted physical testing.

[0060] Combine the following Figure 1 , Figure 2 and Figure 3 , the reliability determination method of the twist pin type electrical connector provided in this application is described in detail. Figure 2 The reliability determination method of the twist pin type electrical connector provided in the embodiment of the present application is as follows: Figure 1 ; Figure 3 A schematic diagram of the twisted wire pin structure of the twist pin type electrical connector provided in an embodiment of the present application. Figure 2 The execution subject of the embodiment shown is Figure 1 The reliability calculation device 12 in the illustrated embodiment. Figure 2 As shown, the method includes:

[0061] S201. Obtain design parameters of the electrical connector.

[0062] Specifically, the reliability calculation device 12 obtains design parameters of the electrical connector.

[0063] Exemplarily, the reliability calculation device 12 obtains the structural parameters and working condition parameters of the electrical connector. The structural parameters of the electrical connector include: the diameter D0 of the outermost strand of the stranded wire pin, the cantilever length L of the stranded wire pin, c , the radius R of the convex hull of the twisted wire pin ch 、Inner radius of the socket R jid 、Inner chamfer radius R of the socket j , the number of twisted wires N in the outermost layer of the twisted wire pin; the operating parameters of the electrical connector during service include: temperature stress T, vibration stress S and working time t.

[0064] For example, the radius R of the twisted wire pin, the outermost twisted wire of the twisted wire pin, and the convex hull of the fat head of the twisted wire pin of the twisted pin type electrical connector is ch , Twisted wire pin cantilever length L c like Figure 3 shown.

[0065] Exemplarily, the reliability calculation device 12 obtains the design parameters of the electrical connector, including obtaining the design parameters of the electrical connector in the following manner:

[0066] Method 1: The reliability calculation device 12 can obtain the following design parameters of the electrical connector from the data acquisition device 11: D0, L c , R ch , R jid , R j , N, T, S, t. Or,

[0067] Method 2: The reliability calculation device 12 can also obtain the preset electrical connector design parameter t (such as the design life of the electrical connector) from the reliability calculation device 12 itself, and obtain the electrical connector design parameters D0, L from the data acquisition device 11. c , R ch , R jid , R j , N, T, S to obtain the above design parameters.

[0068] S202. Use a predetermined reliability model to perform model analysis on design parameters to obtain the reliability of the electrical connector; wherein the training samples of the reliability model include the design parameters of the electrical connector under different environmental stress parameters; and the reliability characterizes the reliability of the electrical connector under the influence of environmental stress.

[0069] Specifically, after obtaining the design parameters of the electrical connector according to step S201, the reliability calculation device 12 uses a predetermined reliability model to perform model analysis on the design parameters to obtain the reliability of the electrical connector; wherein, the training samples of the reliability model include the design parameters of the electrical connector under different environmental stress parameters; further, the environmental stress parameters include temperature stress parameters and vibration stress parameters; the reliability characterizes the reliability of the electrical connector under the influence of environmental stress, and the reliability is used to perform parameter optimization processing on the design parameters.

[0070] Exemplarily, the reliability calculation device 12 uses a predetermined reliability model to perform model analysis on the structural parameters and the operating condition parameters to obtain the reliability of the electrical connector under the effects of temperature stress and vibration stress.

[0071] Exemplarily, the reliability calculation device 12 uses the following reliability model to perform model analysis on the structural parameters and the operating condition parameters to obtain the reliability of the electrical connector under the effects of temperature stress and vibration stress:

[0072]

[0073] Among them, ω is the deflection generated after the twisted wire pin and the socket are stably inserted, R ch R is the radius of the convex hull of the twisted wire pin. jid R is the inner radius of the socket. j is the chamfer radius of the inner circle of the socket, I is the moment of inertia of the outermost wire of the twisted wire pin, D0 is the diameter of the outermost wire of the twisted wire pin, F p L is the contact pressure after the twisted wire pin and the socket are stably inserted. c is the cantilever length of the twisted wire pin, E is the elastic modulus of the twisted wire material, C is the stress relaxation rate of a single twisted wire after one hour of stress relaxation, T1 is the temperature stress, S is the vibration stress, v p is the stress relaxation rate of the contact pressure between a single strand and the socket, α is the film resistance degradation rate, α~LN(μ α , σ α 2 ) means that α follows a log-normal distribution, μ α is the logarithmic mean of α, r is the contact resistance between the twisted wire pin and the socket, r vis the bulk resistance of the contact material, ρ1 is the resistivity of the twisted wire pin, ρ is the resistivity of the twisted wire, N is the number of twisted wires in the outermost layer of the twisted wire pin, t is the working time, π is the circumference, H is the material contact hardness, R(z) is the reliability function, D is the failure threshold of the contact resistance, r s * is the contraction resistance between a single twisted wire and the pin in parallel, s is the integral variable, g is the number of contacts of the electrical connector, σ α , β, z1, z2, z3, z4, z5, z6, z7, z8, and z9 are all preset parameter values ​​of the model obtained through experimental statistics.

[0074] For example, the film resistance degradation rate α and the stress relaxation rate v of the contact pressure between a single strand and the plug are p They are determined by the following formulas:

[0075]

[0076] v p =A S exp(-Q / kT1)S a ;

[0077] Among them, A S is a constant related to the material, ΔE is the activation energy in the reaction kinetics theory, k is the universal gas constant, T1 is the temperature stress, S is the vibration stress, H is the material contact hardness, N is the number of twisted wires in the outermost layer of the twisted wire pin, Q is the thermal activation energy, β and a are the preset parameter values ​​of the model obtained through experimental statistics.

[0078] The reliability model in the embodiment of the present application not only considers the influence of the temperature stress factor in the environmental stress on the reliability of the electrical connector, but also fully considers the influence of the vibration stress in the environmental stress on the reliability of the electrical connector. The design parameters of the electrical connector can be analyzed by the model of the reliability model of the present application to obtain the reliability of the electrical connector corresponding to the design parameters under the combined effect of the environmental stress including temperature stress and vibration stress. For electrical connectors used in working conditions where the environmental stress includes temperature stress and vibration stress, the reliability obtained by the model analysis of the reliability model of the present application is more accurate than the reliability determined by the model analysis of the reliability design model of the prior art.

[0079] It can be seen from the above reliability model that the reliability calculation device 11 can calculate the design parameters D0 and L c , R ch , R jid , R j, N, T, S, t are input into the reliability model, and the reliability R of the electrical connector can be obtained through calculation and analysis of the reliability model. Specifically, the reliability R is the reliability of the electrical connector corresponding to the working time t.

[0080] Optionally, after the reliability calculation device 12 uses a predetermined reliability model to perform model analysis on the design parameters in step S202 and obtains the reliability R of the electrical connector, the reliability calculation device 12 may also determine whether the obtained reliability R is lower than a reliability threshold δ R , if the obtained reliability R is lower than the reliability threshold δ R , then adjust the parameter values ​​of the design parameters.

[0081] The reliability determination method of the twist pin type electrical connector provided in the present application performs model analysis on the design parameters of the electrical connector through a reliability model to obtain the reliability of the electrical connector, wherein the reliability model fully considers the influence of temperature stress factors and vibration stress factors on the reliability of the electrical connector, thereby ensuring that the reliability of the aerospace electrical connector determined by the reliability determination method of the present application is more accurate than the reliability determined by the reliability design model method of the prior art. The application of the reliability determination method of the twist pin type electrical connector provided in the present application will greatly enhance the overall design capability of aerospace electrical connectors.

[0082] Combine the following Figure 1 , Figure 2 , Figure 4 and Figure 5 The reliability determination method of the twist pin type electrical connector provided in the present application is further explained. Figure 4 The reliability determination method of the twist pin type electrical connector provided in the embodiment of the present application is as follows: Figure 2 . Figure 5 This is a schematic diagram of the life curve provided in the embodiment of the present application. Figure 4 The execution subject of the embodiment shown is Figure 1 The reliability calculation device 12 in the illustrated embodiment. Figure 4 As shown, the method includes:

[0083] S301. Obtain design parameters of the electrical connector.

[0084] Specifically, the specific implementation principle of this step is Figure 2 The specific implementation principle of step S201 in the illustrated embodiment is similar and will not be described in detail in this embodiment.

[0085] S302: Use a predetermined reliability model to perform model analysis on design parameters to obtain the reliability of the electrical connector.

[0086] Specifically, the specific implementation principle of this step is Figure 2 The specific implementation principle of step S202 in the illustrated embodiment is similar and will not be repeated herein in this embodiment.

[0087] S303: Obtain the corresponding relationship between the reliability R of the electrical connector and different working time lengths t.

[0088] Specifically, since the reliability R of the electrical connector represents the reliability R of the electrical connector at its working time t, after the reliability calculation device 12 obtains the reliability of the electrical connector in step S302, it can obtain the corresponding relationship between the reliability R of the electrical connector and different working times t.

[0089] S304: Determine the maximum life of the electrical connector corresponding to the design parameters according to the corresponding relationship.

[0090] Specifically, the reliability calculation device 12 determines the maximum life of the electrical connector corresponding to the design parameters according to the corresponding relationship between the reliability R determined in step S303 and different working time lengths t.

[0091] For example, the reliability calculation device 12 calculates the reliability threshold δ of the electrical connector based on the reliability threshold δ of the electrical connector. R , we can get the reliability threshold δ R Corresponding working time δ t , the δ t This is the maximum life of the electrical connector.

[0092] Optionally, the reliability calculation device 12 can also draw a life curve with the reliability R and the working time t of the electrical connector as coordinates based on the corresponding relationship between the reliability R and different working time t determined in step S303. R , and δ R The corresponding limiting lifespan δ t like Figure 5 shown.

[0093] Generally speaking, in the design scenario of electrical connectors, whether the design parameters of the electrical connectors are reasonable and whether they need to be optimized and adjusted is mainly based on the design life T of the electrical connectors. d Reliability of time R d This is determined as follows:

[0094] If R d ≥δ R , it means that the design parameters of the electrical connector can meet the design requirements and no optimization adjustment is required;

[0095] If R d <δ R , it means that the design parameters of the electrical connector cannot meet the design requirements and need to be optimized and adjusted.

[0096] However, in addition to the design scenarios of electrical connectors, in the structural research of electrical connectors or the expansion of the application fields of electrical connectors based on the ultimate life, the life curve that characterizes the relationship between the reliability of the electrical connector and the change in working time, as well as the ultimate life of the electrical connector, is often used. Therefore, by adopting the reliability determination method of the twist pin type electrical connector provided in this application, the reliability of the electrical connector, the life curve of the relationship between the reliability of the electrical connector and the change in working time, and the ultimate life of the electrical connector can be determined, providing strong theoretical support for the design, research and application expansion of the electrical connector.

[0097] Therefore, the reliability determination method of the twist pin type electrical connector provided in the embodiment of the present application can determine the design life T required in the design process of the electrical connector by performing model analysis on the design parameters through a predetermined reliability model. d Reliability of time R d , and a life curve that characterizes the relationship between the reliability and working time of the electrical connector, as well as the ultimate life of the electrical connector can also be obtained. At the same time, the reliability determination method of the twist pin type electrical connector provided in the embodiment of the present application can also be used to analyze the ultimate life of an electrical connector with an unknown ultimate life. Therefore, the reliability determination method of the twist pin type electrical connector provided in the embodiment of the present application has brought great convenience to the design, research and expansion of the application field of the electrical connector.

[0098] The present application also provides a reliability calculation device for a twist pin type electrical connector. Figure 1 and Figure 6 This device will be described. Figure 6 This is a structural diagram of a reliability calculation device for a twist pin type electrical connector provided in an embodiment of the present application. Figure 6 As shown, the device comprises:

[0099] A processing unit 61 and a model unit 62, wherein the processing unit 61 is connected to the model unit 62;

[0100] The processing unit 61 is used to obtain the design parameters of the electrical connector from the data acquisition device 11, and send the design parameters obtained from the data acquisition device 11 and the preset design parameters in the processing unit 61 to the model unit 62;

[0101] The model unit 62 is used to perform model analysis on the obtained design parameters using a predetermined reliability model to obtain the reliability of the electrical connector, and send the reliability to the processing unit 61; wherein the training samples of the reliability model include the design parameters of the electrical connector under different environmental stress parameters; the reliability represents the reliability of the electrical connector corresponding to the working time t of the electrical connector under the environmental stress;

[0102] The processing unit 61 is further used to obtain the maximum life of the electrical connector based on the corresponding relationship between the reliability R and different working time lengths t; and send at least one of the reliability and the maximum life to the data acquisition device 11.

[0103] The implementation principle and technical effect of the reliability calculation device of the twist pin type electrical connector provided in the embodiment of the present application are similar to those of the present invention. Figure 4 The implementation principle and technical effect of the illustrated embodiment are similar, and will not be described in detail herein.

[0104] The embodiment of the present application also provides a reliability calculation device. Figure 7 This is a structural diagram of the reliability calculation device provided in the embodiment of the present application. Figure 7 As shown, the reliability calculation device includes a processor 71 and a memory 72, and the memory 72 stores executable instructions of the processor 71, so that the processor 71 can be used to execute the technical solution of the above method embodiment, and its implementation principle and technical effect are similar, and this embodiment will not be repeated here. It should be understood that the above processor 71 can be a central processing unit (English: Central Processing Unit, referred to as: CPU), or other general-purpose processors, digital signal processors (English: Digital Signal Processor, referred to as: DSP), application-specific integrated circuits (English: Application Specific Integrated Circuit, referred to as: ASIC), etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the invention can be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor. The memory 72 may include a high-speed random access memory (English: Random Access Memory, referred to as: RAM), and may also include a non-volatile memory (English: Non-volatile memory, referred to as: NVM), such as at least one disk storage, and can also be a U disk, a mobile hard disk, a read-only memory, a disk or an optical disk, etc.

[0105] The embodiment of the present application also provides a storage medium, in which computer executable instructions are stored. When these computer executable instructions are executed by a processor, the reliability determination method of the twist pin type electrical connector described above is implemented. The storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (English: Static Random-Access Memory, referred to as: SRAM), electrically erasable programmable read-only memory (English: Electrically-Erasable Programmable Read-Only Memory, referred to as: EEPROM), erasable programmable read-only memory (English: Erasable Programmable Read-Only Memory, referred to as: EPROM), programmable read-only memory (English: Programmable Read-Only Memory, referred to as: PROM), read-only memory (English: Read-Only Memory, referred to as: ROM), magnetic memory, flash memory, magnetic disk or optical disk. The storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0106] An exemplary storage medium is coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an application specific integrated circuit (English: Application Specific Integrated Circuits, referred to as: ASIC). Of course, the processor and the storage medium can also exist as discrete components in an electronic device or a main control device.

[0107] An embodiment of the present application also provides a program product, such as a computer program, which, when executed by a processor, implements the reliability determination method of the twist pin type electrical connector covered by the present application.

[0108] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0109] Finally, it should be noted that the above implementation modes are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned implementation modes, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned implementation modes, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation modes of the present invention.

Claims

1. A method for determining the reliability of a twist pin type electrical connector, characterized in that: include: Obtaining design parameters of the electrical connector; A predetermined reliability model is used to perform a model analysis on the design parameters to obtain the reliability of the electrical connector; wherein the training samples of the reliability model include the design parameters of the electrical connector under different environmental stress parameters; and the reliability represents the reliability of the electrical connector under the environmental stress. Wherein, the reliability is used to perform parameter optimization processing on the design parameters; The reliability model includes the film resistance degradation rate and the stress relaxation rate of the contact pressure between the single strand and the socket , the film resistance degradation rate and the stress relaxation rate of the contact pressure between the single strand and the socket They are determined by the following formulas: ； in, is a constant related to the material, is the activation energy in the reaction kinetics theory, is the universal gas constant, is the temperature stress, is the vibration stress, is the material contact hardness, is the number of twisted wires in the outermost layer of the twisted wire pin, is the thermal activation energy, , Preset parameter values ​​for the model obtained through experimental statistics.

2. The method according to claim 1, characterized in that: The environmental stress parameters include temperature stress parameters and vibration stress parameters; The obtaining of design parameters of the electrical connector includes: Obtaining structural parameters and operating parameters of the electrical connector; The adopting a predetermined reliability model to perform model analysis on the design parameters to obtain the reliability of the electrical connector includes: A predetermined reliability model is used to perform model analysis on the structural parameters and operating parameters to obtain the reliability of the electrical connector under the effects of temperature stress and vibration stress.

3. The method according to claim 2, characterized in that The structural parameters include: the diameter of the outermost twisted wire of the twisted wire pin , Twisted wire pin cantilever length , the radius of the convex hull of the twisted wire pin , Inner radius of the socket , Chamfer radius of the inner round of the socket , the number of twisted wires in the outermost layer of the twisted wire pin ; The working condition parameters include: temperature stress , vibration stress and working hours ; The adopting a predetermined reliability model to perform model analysis on the structural parameters and the operating condition parameters to obtain the reliability of the electrical connector under the action of temperature stress and vibration stress includes: The following reliability model is used to perform model analysis on the structural parameters and operating parameters to obtain the reliability of the electrical connector under temperature stress and vibration stress: in, It is the deflection produced after the twisted wire pin and the socket are stably inserted. is the radius of the convex hull of the twisted wire pin, is the inner radius of the jack, is the chamfer radius of the inner round of the socket, is the moment of inertia of the outermost twisted wire of the twisted wire pin, is the diameter of the outermost wire of the twisted wire pin, It is the contact pressure after the twisted wire pin and the socket are stably inserted. is the cantilever length of the twisted wire pin, is the elastic modulus of the twisted wire material, is the stress relaxation rate of a single strand after one hour of stress relaxation, is the temperature stress, is the vibration stress, is the stress relaxation rate of the contact pressure between a single strand and the socket, is the film resistance degradation rate, Expressed as It follows a log-normal distribution, for Logarithmic mean, is the contact resistance between the twisted wire pin and the socket, is the bulk resistance of the contact to the material, is the resistivity of the twisted wire pin, is the resistivity of the twisted wire, is the number of twisted wires in the outermost layer of the twisted wire pin, For working hours, is the circumference of a circle, is the material contact hardness, is the reliability function, is the failure threshold of the contact resistance, is the contraction resistance between a single twisted wire and the pin in parallel state, is the integration variable, is the number of contacts of the electrical connector, , , , , , , , , , , These are the preset parameter values ​​of the model obtained through experimental statistics.

4. The method according to any one of claims 1 to 3, characterized in that: After the reliability of the electrical connector is obtained by performing a model analysis on the design parameters using a predetermined reliability model, the method further includes: determining whether the obtained reliability is below a reliability threshold; If the obtained reliability is lower than the reliability threshold, the parameter value of the design parameter is adjusted.

5. The method according to any one of claims 1 to 3, characterized in that: The method further comprises: Obtaining the reliability of the electrical connector With different working hours The corresponding relationship between them; According to the corresponding relationship, the maximum life of the electrical connector corresponding to the design parameters is determined.

6. A reliability calculation device for a twist pin type electrical connector, characterized in that: The device comprises: A processing unit and a model unit, wherein the processing unit is connected to the model unit respectively; The processing unit is used to obtain design parameters of the electrical connector from a data acquisition device, and send the design parameters obtained from the data acquisition device and the preset design parameters in the processing unit to the model unit; The model unit is used to use a predetermined reliability model to perform model analysis on the obtained design parameters, obtain the reliability of the electrical connector, and send the reliability to the processing unit; wherein the training samples of the reliability model include the design parameters of the electrical connector under different environmental stress parameters; the reliability represents the working time of the electrical connector under the environmental stress. Reliability of time correspondence; The reliability model includes the film resistance degradation rate and the stress relaxation rate of the contact pressure between the single strand and the socket , the film resistance degradation rate and the stress relaxation rate of the contact pressure between the single strand and the socket They are determined by the following formulas: ； ； in, is a constant related to the material, is the activation energy in the reaction kinetics theory, is the universal gas constant, is the temperature stress, is the vibration stress, is the material contact hardness, is the number of twisted wires in the outermost layer of the twisted wire pin, is the thermal activation energy, , Preset parameter values ​​for the model obtained through test statistics; The processing unit is further configured to: With different working hours The corresponding relationship between them is used to obtain the maximum life of the electrical connector; and at least one of the reliability and the maximum life is sent to the data acquisition device.

7. A reliability calculation device, characterized in that: include: Processor and memory; The memory stores executable instructions executable by the processor; The processor executes the executable instructions stored in the memory, so that the processor executes the method according to any one of claims 1 to 5.

8. A storage medium, characterized in that: The storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 5 when executed by a processor.

9. A program product, comprising a computer program, wherein when the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

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